package com.wl.util;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

/**
 * @author: 吴磊
 * @program: Mybatis
 * @create: 2021-01-19 14:26
 */

public class MybatisUtils {
    private static SqlSessionFactory sqlSessionFactory;

    static {
        try {
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static SqlSession getSqlSession() {
        return sqlSessionFactory.openSession(true);
    }

    /**
     * 获取Mapper
     *
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getMapper(Class<T> clazz) {
        SqlSession sqlSession = getSqlSession();
        T target = sqlSession.getMapper(clazz);
        return target;
    }
}
